URL des Documents de travail : http://ces.univ-paris1.fr/cesdp/cesdp2015.htmlDocuments de travail du Centre d'Economie de la Sorbonne 2015.67 - ISSN : 1955-611XWe build dynamic general equilibrium models with heterogeneous producers and financial market imperfections. First, we prove the existence of equilibrium. Second, we investigate the role of financial market imperfection in growth and land prices. Third, we introduce land dividends, then define and study land bubbles as well as individual land bubbles